This is recorded for patient activity. A patient who is an overseas visitor does not qualify for free NHS healthcare and can choose to pay for NHS treatment or for private treatment. If they pay for NHS treatment then they should be recorded as NHS patients. The patient's administrative category code may change during an episode or spell. For example, the patient may opt to change from NHS to private health care. In this case, The start and end dates for each new administrative category period (episode or spell) should be recorded.